org.switchyard.component.bpel.riftsaw.RiftsawServiceLocator Maven / Gradle / Ivy
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/*
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.switchyard.component.bpel.riftsaw;
import java.util.HashMap;
import java.util.Map;
import javax.xml.namespace.QName;
import javax.xml.soap.SOAPFault;
import org.jboss.logging.Logger;
import org.riftsaw.engine.Fault;
import org.riftsaw.engine.Service;
import org.riftsaw.engine.ServiceLocator;
import org.switchyard.Exchange;
import org.switchyard.ExchangePattern;
import org.switchyard.ExchangeState;
import org.switchyard.Message;
import org.switchyard.Scope;
import org.switchyard.ServiceDomain;
import org.switchyard.ServiceReference;
import org.switchyard.component.bpel.BPELFault;
import org.switchyard.config.model.implementation.bpel.BPELComponentImplementationModel;
import org.switchyard.component.bpel.BPELLogger;
import org.switchyard.component.bpel.BPELMessages;
import org.switchyard.component.common.DeliveryException;
import org.switchyard.component.common.SynchronousInOutHandler;
import org.switchyard.component.common.label.EndpointLabel;
import org.switchyard.config.model.composite.ComponentReferenceModel;
import org.switchyard.deploy.ComponentNames;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* This class implements the service locator interface to retrieve a
* reference to an external service (provided by switchyard) for use
* by a BPEL process instance.
*
*/
public class RiftsawServiceLocator implements ServiceLocator {
private static final Logger LOG = Logger.getLogger(RiftsawServiceLocator.class);
private static final long DEFAULT_TIMEOUT = 120000;
private Map _serviceDomains = new HashMap();
private java.util.Map _registry=new java.util.HashMap();
private long _waitTimeout = DEFAULT_TIMEOUT;
/**
* This is the constructor for the riftsaw service locator.
*
*/
public RiftsawServiceLocator() {
}
/**
* Add a service -> service domain mapping.
* @param serviceName service name
* @param serviceDomain The service domain
*/
public void addServiceDomain(QName serviceName, ServiceDomain serviceDomain) {
_serviceDomains.put(serviceName, serviceDomain);
}
/**
* Remove a service -> service domain mapping.
* @param serviceName the service name
*/
public void removeServiceDomain(QName serviceName) {
_serviceDomains.remove(serviceName);
}
/**
* This method returns the service domain for a given service.
* @param serviceName service name
* @return The service domain
*/
public ServiceDomain getServiceDomain(QName serviceName) {
return _serviceDomains.get(serviceName);
}
/**
* This method returns the service associated with the supplied
* process, service and port.
*
* @param processName The process name
* @param serviceName The service name
* @param portName The port name
* @return The service or null if not found
*/
public Service getService(QName processName, QName serviceName, String portName) {
// Currently need to just use the local part, without the version number, to
// lookup the registry entry
int index=processName.getLocalPart().indexOf('-');
QName localProcessName=new QName(processName.getNamespaceURI(),
processName.getLocalPart().substring(0, index));
RegistryEntry re=_registry.get(localProcessName);
if (re == null) {
BPELLogger.ROOT_LOGGER.noServiceReferencesFoundForProcess(localProcessName.toString());
return (null);
}
Service ret=re.getService(serviceName, portName, _serviceDomains.get(serviceName));
if (ret == null) {
BPELLogger.ROOT_LOGGER.noServiceFoundFor(serviceName.toString(), portName);
}
return (ret);
}
/**
* This method registers a component reference against the service BPEL
* process, for use when it calls out to the external service.
*
* @param crm The component reference
*/
public void initialiseReference(ComponentReferenceModel crm) {
// Find the BPEL implementation associated with the reference
if (crm.getComponent() != null
&& crm.getComponent().getImplementation() instanceof BPELComponentImplementationModel) {
BPELComponentImplementationModel impl=
(BPELComponentImplementationModel)crm.getComponent().getImplementation();
QName processName=impl.getProcessQName();
if (LOG.isDebugEnabled()) {
LOG.debug("Register reference "+crm.getName()+" ("+crm.getQName()+") for process "+processName);
}
RegistryEntry re=_registry.get(processName);
if (re == null) {
re = new RegistryEntry();
_registry.put(processName, re);
}
javax.wsdl.Definition wsdl=WSDLHelper.getWSDLDefinition(crm.getInterface().getInterface());
javax.wsdl.PortType portType=WSDLHelper.getPortType(crm.getInterface().getInterface(), wsdl);
re.register(portType, crm.getQName(), crm.getComponent().getQName());
} else {
throw BPELMessages.MESSAGES.couldNotFindBPELImplementationAssociatedWithReference();
}
}
/**
* This class provides a registry entry for use in looking up the
* appropriate service to use for an external BPEL invoke.
*
*/
public class RegistryEntry {
private java.util.List _portTypes=
new java.util.Vector();
private java.util.List _services=
new java.util.Vector();
private QName _componentName;
/**
* This method registers the wsdl, port type and service details.
*
* @param portType The port type
* @param service The SwitchYard service
* @param componentName the service component name for this registry entry
*/
public void register(javax.wsdl.PortType portType, QName service, QName componentName) {
_portTypes.add(portType);
_services.add(service);
_componentName = componentName;
}
/**
* This method returns the service associated with the supplied service and
* port names.
*
* @param serviceName The service name
* @param portName The port name
* @param serviceDomain The service domain
* @return The service or null if not found
*/
public Service getService(QName serviceName, String portName, ServiceDomain serviceDomain) {
Service ret = null;
for (int index = 0, count = _services.size(); index < count; ++index) {
if (serviceName.equals(_services.get(index))) {
QName refName = ComponentNames.qualify(_componentName, serviceName);
ServiceReference sref = serviceDomain.getServiceReference(refName);
if (sref != null) {
ret = new ServiceProxy(sref, _portTypes.get(index));
}
break;
}
}
if (ret == null) {
BPELLogger.ROOT_LOGGER.noServiceFoundFor(serviceName.toString());
}
return ret;
}
}
/**
* This class represents a service proxy, used by the BPEL engine to invoke
* and external service. The proxy intercepts the request and applies
* it to the appropriate switchyard service.
*
*/
public class ServiceProxy implements Service {
private ServiceReference _serviceReference=null;
private javax.wsdl.PortType _portType=null;
/**
* The constructor for the service proxy.
*
* @param sref The service reference
* @param portType The port type
*/
public ServiceProxy(ServiceReference sref, javax.wsdl.PortType portType) {
_serviceReference = sref;
_portType = portType;
}
/**
* {@inheritDoc}
*/
public Element invoke(String operationName, Element mesg,
Map headers) throws Exception {
// Unwrap the first two levels, to remove the part wrapper
Node node=WSDLHelper.unwrapMessagePart(mesg);
// Need to create an exchange
SynchronousInOutHandler rh = new SynchronousInOutHandler();
Exchange exchange=_serviceReference.createExchange(operationName, rh);
Message req = exchange.createMessage();
req.setContent(node);
if (headers != null) {
for (Map.Entry e : headers.entrySet()) {
exchange.getContext(req).setProperty(e.getKey(), headers.get(e.getKey())).addLabels(EndpointLabel.SOAP.label());
}
// Clear the headers in preparation for response headers
headers.clear();
}
exchange.send(req);
javax.wsdl.Operation operation=_portType.getOperation(operationName, null, null);
Element newresp = null;
Element respelem = null;
if (ExchangePattern.IN_OUT.equals(exchange.getContract().getConsumerOperation().getExchangePattern())) {
try {
exchange = rh.waitForOut(_waitTimeout);
} catch (DeliveryException e) {
throw BPELMessages.MESSAGES.timedOutAfterMsWaitingOnSynchronousResponseFromTargetService(_waitTimeout, _serviceReference.getName().toString());
}
Message resp=exchange.getMessage();
if (resp == null) {
throw BPELMessages.MESSAGES.responseNotReturnedFromOperationOnService(operationName, _serviceReference.getName().toString());
}
// Process header values associated with the response
for (org.switchyard.Property p : exchange.getContext().getProperties(Scope.MESSAGE)) {
if (p.hasLabel(EndpointLabel.SOAP.label())) {
headers.put(p.getName(), p.getValue());
}
}
// Check for exception - but don't rethrow a BPEL
// fault as it will be converted to a message
// response
if (resp.getContent() instanceof Exception
&& !(resp.getContent() instanceof BPELFault)) {
throw (Exception)resp.getContent();
}
respelem = (Element)resp.getContent(Node.class);
newresp=WSDLHelper.wrapResponseMessagePart(respelem, operation);
}
if (exchange.getState() == ExchangeState.FAULT) {
QName faultCode=null;
if ((respelem != null) && (respelem instanceof SOAPFault)) {
SOAPFault fault=(SOAPFault)respelem;
respelem = (Element)fault.getDetail().getFirstChild();
faultCode = fault.getFaultCodeAsQName();
}
Element newfault=WSDLHelper.wrapFaultMessagePart(respelem, operation, null);
throw new Fault(faultCode, newfault);
}
return ((Element)newresp);
}
}
}
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